广东纺织职业技术学院：《纺织材料学》课程教学资源（PPT课件，英文版）6 High Performance Fibers and Fibrous Materials（NXPowerLite）

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Structure of carbon fibers a Turbostratic structure 口 Fiber structure

Structure of carbon fibers  Turbostratic structure  Fiber structure

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Carbon fibers Advantages of all carbon fibers High tensile strength and tensile modulus 口 Nonreactive Resistance to corrosion ■ High heat resistance high tensile strength at elevated temperature 日 Low density

Carbon fibers ◼ Advantages of all carbon fibers  High tensile strength and tensile modulus  Nonreactive ◼ Resistance to corrosion ◼ High heat resistance ◼ high tensile strength at elevated temperature  Low density

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology carbon fibers ■ Disadvantages 口 High cost I Brittle 口 Oxidation at>400%C

Carbon fibers ◼ Disadvantages  High cost  Brittle  Oxidation at > 400ºC

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology carbon fibers a other interesting properties Lubricating properties Electrical conductivity Thermal conductivity Low to negative thermal expansion coefficient

Carbon fibers  Other interesting properties ◼ Lubricating properties ◼ Electrical conductivity ◼ Thermal conductivity ◼ Low to negative thermal expansion coefficient

广东费飘职业故本学院 Guangdong Inatitute of Textile Technology Difference between carbon fiber and graphite f 口 Carbon fibers ■ heat treatment be|oW1700°C less crystalline and lower modulus(<365 GPa) 日 Graphite fibers ■ heat treatment a bove1700°C 川 ore crysta∥ ine(gool) and higher modulus (>365 GPa)

Difference between carbon fiber and graphite fiber  Carbon fibers ◼ heat treatment below 1700°C less crystalline and lower modulus (<365 GPa)  Graphite fibers ◼ heat treatment above 1700°C More crystalline (~80%) and higher modulus (>365GPa)